Share this image

Northern lights seen across the U.S.

View Gallery

Aurora borealis light up the Ozark, Ark., sky on Oct. 24. Photographer Brian Emfinger, a storm chaser, said these are only the second northern lights in a decade that he has seen this far south. Brian Emfinger/realclearwx.com/AP

The northern lights shine over West Grand Traverse Bay near Traverse City, Mich., on Oct. 24. The lights are caused by charged particles striking the Earth's atmosphere. Jan-Michael Stump/Record-Eagle/AP